If it still does it after you do a Reset Settings, you probably have a fault.

Take lots of shots under different conditions (Live View, timer, phone app, AF-C vs AF-S, different lenses, etc) to isolate when it happens.

I have made "settings" mistakes on several occasions which is a sure fire way to learn your camera! I think though that my not firing issue is limited to my DA* lenses. The DA* 50-135 has never worked and my DA*300 "sometimes just finds focus and won't fire. When I switch to my non DA* lenses everything is fine. Well, most everything is fine... the photographer is still error prone.. ;-)

I have made "settings" mistakes on several occasions which is a sure fire way to learn your camera! I think though that my not firing issue is limited to my DA* lenses. The DA* 50-135 has never worked and my DA*300 "sometimes just finds focus and won't fire. When I switch to my non DA* lenses everything is fine. Well, most everything is fine... the photographer is still error prone.. ;-)

On a k-1 or in general? Have you tried converting these to screw drive?

On a k-1 or in general? Have you tried converting these to screw drive?

On both K3 and K3ll bodies. The DA*50-135 I have simply put in a drawer as a bad mistake on my part. Should have known better. The DA*300 only fails to fire maybe 5% of the time which I can live with. Converting a new lens to screw drive after spending $1000 for it is more than I can accept. As is, it sets there as a warning to me to never make the DA* mistake again..

On both K3 and K3ll bodies. The DA*50-135 I have simply put in a drawer as a bad mistake on my part. Should have known better. The DA*300 only fails to fire maybe 5% of the time which I can live with. Converting a new lens to screw drive after spending $1000 for it is more than I can accept. As is, it sets there as a warning to me to never make the DA* mistake again..

I'm just not following the logic of leaving a lens in a drawer vs converting it to make it useful to you. I convert these all the time and people are thrilled to have them working again. I bought mine for $300 on eBay with dead SDM. I was lucky, the SDM woke up and never went to sleep. I also have a DA* 200 and a DA* 60-250 and my niece has a DA 17-70. None have failed and none give problems in focusing.

If you decide to convert either lens I am happy to help you through the process or even convert them (see my thread for SDM conversions in the marketplace.)

I'm just not following the logic of leaving a lens in a drawer vs converting it to make it useful to you. I convert these all the time and people are thrilled to have them working again. I bought mine for $300 on eBay with dead SDM. I was lucky, the SDM woke up and never went to sleep. I also have a DA* 200 and a DA* 60-250 and my niece has a DA 17-70. None have failed and none give problems in focusing.

If you decide to convert either lens I am happy to help you through the process or even convert them (see my thread for SDM conversions in the marketplace.)

In a way I can agree with you. Unfortunately I let my stubbornness override logic sometimes... Its hard for me to rationalize spending $1,000 for a new lens and then spending more to have it converted to a technology that would have made the lens new costing maybe $500. If I had bought it from some poor sucker like me for a deal then having it converted would have been a heck of a deal. So I hang on to the fantasy of finding the person responsible for SDM and making them eat the lens... I'll use my FA 77 and 100 and move to position. Both lenses always focus.

In a way I can agree with you. Unfortunately I let my stubbornness override logic sometimes... Its hard for me to rationalize spending $1,000 for a new lens and then spending more to have it converted to a technology that would have made the lens new costing maybe $500. If I had bought it from some poor sucker like me for a deal then having it converted would have been a heck of a deal. So I hang on to the fantasy of finding the person responsible for SDM and making them eat the lens... I'll use my FA 77 and 100 and move to position. Both lenses always focus.

I think though that my not firing issue is limited to my DA* lenses. The DA* 50-135 has never worked and my DA*300 "sometimes just finds focus and won't fire.

Okay, we have our answer then - not your camera.

Your DA*300 would need its AF motor replaced.

But the DA* 50-135 has its backup method ... and the lens is so good I even used it last weekend on my K-1 in crop mode (see below). It was intermittently not working for the guy I bought it off a couple of years ago, so I relieved him of it, and converted it in about fifteen minutes.

But the DA* 50-135 has its backup method ... and the lens is so good I even used it last weekend on my K-1 in crop mode (see below). It was intermittently not working for the guy I bought it off a couple of years ago, so I relieved him of it, and converted it in about fifteen minutes.

Well, while the DA*300 hasn't been used a whole lot and while it is a very fine optic.... I'm not paying Ricoh to fix their "F" up. The focusing mechanisms in the DA* lenses appears to be a great teaching aid in Engineering college's of how not to design an electromechanical focusing mechanism. I "may" get the DA*50-135 converted as its so reasonable cost wise and because there isn't any other quality crop sensor zoom in that focal range available to replace it. If the DA*300 craps out it goes to the dump and I'll save up and buy the lens I really wanted, the Sigma 300 f2.8 which is both optically great and always focuses.

Having said all of that, I really like all of my Pentax gear especially the FA lenses along with my DA*16-50 which is a great lens and so far has worked/focused every time but one out of three lenses working isn't enough justification to invest any more money into DA* lenses..

Great photo by the way. Shows how good the DA*50-135 glass really is...
Bob